Input validation error in Linux kernel - CVE-2013-7270

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Main Vulnerability Database Vulnerabilities #VU42188

Input validation error in Linux kernel - CVE-2013-7270

Published: January 6, 2014 / Updated: August 10, 2020


Vulnerability identifier: #VU42188
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2013-7270
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.


Affected software

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-lts-quantal (Ubuntu package)
linux-lts-raring (Ubuntu package)
linux-lts-saucy (Ubuntu package)

How to mitigate CVE-2013-7270

Install update from vendor's website.

linux (Ubuntu package) - addressed in versions 2.6.32-57.119, 3.2.0-59.90, 3.5.0-47.71, 3.11.0-17.31
linux-lts-quantal (Ubuntu package) - update to 3.5.0-47.71~precise1
linux-lts-raring (Ubuntu package) - update to 3.8.0-37.53~precise1
linux-lts-saucy (Ubuntu package) - update to 3.11.0-17.31~precise1

External References

Related Security Bulletins